Found this:
Let’s Play! To start the game, randomly place four maze cards in the
center of the table to form a square. The remaining maze cards and
placed in a pile where all players can reach them. Each player then draws
two maze cards and puts them face up in front of them. On your turn,
add one of your cards to the growing maze. In order to be able to take
a card from the maze, there must be a path formed from one of the
treasures on the card you played to a matching treasure somewhere
else in the maze. If this is the case, you can take the card with the same
treasure as the card you just played and it will be counted as one of your
points at the end of the game. However, you cannot take the card from
the maze if it leaves another maze card disconnected. If you cannot form
a path to a matching treasure with either of your cards, simply connect
one of your cards to the maze and draw another card. When the card
deck has been depleted, the player who collected the most cards from
the maze wins the game.
http://www.educationallearninggames.com/labyrinth-card-game.asp